Pilot Accumulator Functions (Optional) - Hitachi ZAXIS 135US-6 class Operator's Manual

Hydraulic excavator

Table of Contents

Pilot Accumulator Functions (Optional)

Pilot accumulator (1) is a pressure storage reservoir of the

control circuit which supplies pressure and enables operation

of the control circuit even after stopping the engine.

The front attachment can be lowered using the control lever

and the weight of the attachment itself, and pressure in the

hydraulic circuit can be released after stopping the engine.

Pressure Release Procedure of Hydraulic Circuit

1. Set the machine in the parking position.

2. Pull the pilot control shut-off lever to the LOCK position.

Perform items from 3 to 5 within 15 seconds.

As the pressure in pilot accumulator (1) gradually decreases

after stopping the engine, pressure in the hydraulic circuit

can be released for few seconds after stopping the engine.

3. Stop the engine. Turn the key switch ON.

4. Push the pilot control shut-off lever to the UNLOCK

5. Move the control levers and attachment pedals forward

and rearward or left and right to release pressure from

the hydraulic circuit.

6. Pull the pilot control shut-off lever to the LOCK position

and turn the key switch OFF.

OPERATING THE MACHINE